25AA256_13 Datasheet, PDF (4/32 Pages) Microchip Technology – 256K SPI Bus Serial EEPROM

25AA256/25LC256
TABLE 1-2: AC CHARACTERISTICS (CONTINUED)
AC CHARACTERISTICS
Industrial (I): TA = -40°C to +85°C
Automotive (E): TA = -40°C to +125°C
VCC = 1.8V to 5.5V
VCC = 1.8V to 5.5V
Param.
No.
Sym.
Characteristic
Min.
Max. Units
Test Conditions
18
THZ HOLD Low to Output
High-Z
30
—
ns 4.5V Vcc  5.5V (Note 1)
60
—
ns 2.5V Vcc  4.5V (Note 1)
160
—
ns 1.8V Vcc  2.5V (Note 1)
19
THV HOLD High to Output
30
—
ns 4.5V Vcc  5.5V
Valid
60
—
ns 2.5V Vcc  4.5V
160
—
ns 1.8V Vcc  2.5V
20
TWC Internal Write Cycle
Time
—
5
ms (Note 2)
21
— Endurance
1M
—
E/W 25°C, VCC = 5.5V (Note 3)
Cycles
Note 1: This parameter is periodically sampled and not 100% tested.
2: TWC begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle
is complete.
3: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site
at www.microchip.com.
TABLE 1-3: AC TEST CONDITIONS
AC Waveform:
VLO = 0.2V
—
VHI = VCC – 0.2V
(Note 1)
VHI = 4.0V
(Note 2)
CL = 50 pF
—
Timing Measurement Reference Level
Input
0.5 VCC
Output
0.5 VCC
Note 1: For VCC  4.0V
2: For VCC > 4.0V
DS21822G-page 4
 2003-2013 Microchip Technology Inc.